You create a new data model by selecting find new model. Once he signed the modeling tool, what we must do on the first place is to create a concept model with entities, attributes and relationships. Our conceptual data model is more abstract than a logical data model or a physical data model. Their attributes and the relationship between them. Our conceptual data model, CDM, helps you analyze the conceptual structure of an information system to identify the principle entities to be represented. The Physical design is generated by the tool, where you can create a DDL file with the sentences to create a database object corresponding to physical modeling. And the tool performs a logical design using the relational model and with the Logical design. You only have to make the Conceptual design diagram using the Entity-Relationship Model. In this example, we use PowerDesigner Data Architect because it's one of the few that allow us to perform the three steps, the Conceptual Design, the Logical Design, and the Physical Design. In this session we will learn the steps of relational database modeling.
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